Needle plate for fur-sewing machines



July 24, 1928. H. ROSS NEEDLE PLATE FOR FUR SEWING MACHINES Filed Feb. 10, 1927 R mm E E g a,

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Patented July 24, 15928.

' UNITED STATES 1,571,991 PATENT OFFICE. I

HARRY Ross, on new 033, Y-., as sienon :TQ FUR GUIDE MACHINE CORPORATION, on NEW YORK, n.1, A ooRPoRA'rIon or new YORK.

NEEDLE PLATE non FUR-SEWING MACHINES."

Application filed February 10, 1927. Serial No. 167,121.

This invention relates to improvements in needle plat-es, and more particularly to need-1e plates used in fur sewing machines, as for instance in the type of machine as shown in my Patent, No; 1,541,751 dated June 9th, 1925.

One of the objects of the invention is to provide means in a machine of the nature referred to that will prevent the breaking of needles and the resultant loss of time in replacing and rethrc'ading ofthe new needle.

Another object of the invention isto. provide means for preventing the driven feed disk in a machine of this nature from tipping and rising on its bearing, when the said bearing becomes worn.

A further object ofthe invention is to provide means for positively locating the needle-plate in relation to the needle. I

A still further object of the invention is to provide auxiliary loop forming means when furs that have not been thoroughly dried are sewn on the machine and a sewing thread becomes limp through dampness and fails to naturally form such loop.

Other objects and novel features of my invention will become apparent as the specification proceeds; n

In the drawings, forming a part of this specification:

Figure 1 is a view in side elevation of a machine of the type disclosed in my Patent No. 1,5t1,751;

Figure 2 is a top plan view ofa portion of the mechanism shown in Figure 1;

Figure 3 is asectional view taken on line 33, Figure 2 showing the auxiliary loop forming means mounted upon the needle plate;

F igurel is a sectional view taken on line l l, Figure 3, and

Figure 5 is a detail View in perspective partly broken away, showing the combined disk tipping preventing means and the auxiliary loop former.

Referring to the drawings in detail, .in which like numerals refer to the same parts throughout the several views, indicates a fur sewing machine provided with a fly wheel 11 on a shaft 12 suitably connected to a source of power not shown. A needle bar 13, having a needle 14; is operated for sewing from the said shaft '12 by the means shown in my Patent No. 1,541,751. A feed disk 15 is suitably mounted and driven in step step motion by any suitable means (not shown) as the sa id means form no part of my inventionl Go-operating with the said disk15 is adriven disk 16, normally held in resilient contact with the disk 15 by means of a spring 17 on a. rod 18 slidingly supported inthe walls 19 and 20 of the frame of the machine. Fixed to a bracket 21, carri'e'd by the rod 18 is an arm 22 provided with a stud 28 upon which the disk .16 is rotatably mounted The said bracket 21 1's prevented from turning by means of'a lower rod 18 fixed thereto and supported in the walls 19'aiid 20 of the frame. of the machiiie. 'A loopei bar 24 is provided with a looper 25 at one end thereofand is operated for producing a loopin the manner as disclosed iiimy Patent No. 1,541.751 Y is custon'iary, when feeding-mo strips of fur of uneven length between'the disks 15 and 16, to form acollar or the like to retard the feeding movement of the disklG against which the shorter strip of fur bears, by exerting pressure against the said disk by the hand of the operator. The said pressure, together with a normal rotation of the disk 16, caiis'es' considerable wear on the bearing thereof with a, consequent tipping upwardly of the inwardly disposed portion of the periphery of the said disk, causing the needle 1 1 to strike the said diskand the said impact will cause the needle to break.

To'prevcnt this tipping of the disk and consequent breaking of the needle, I provide the usual needle plate 26 With a groove 27 cut across its lower surface, and two short grooves 28 in its upper surface. Into the said grooves, I insert a resilient member 29 provided with semi-spherical projections 29 on the under side thereof which normally come in cont-act with the surface 30 of the disk 16. These projections normally exert no pressure against the surface 30 as the resilient or spring member 29 is not under tension, thus permitting the disk 16 to be freely rotated. However, when any wear takes place between the stud 23 and the disk 16, the said disk will tend to tip upwardly, thus stressing the resilient member 29 which is sufiiciently rigid to prevent any appreciable tipping of the said disk. The needle plate 26 is further provided with an arm 32 extending therefrom and projecting into aslot 83 in the bracket 21. This arm 32 prevents any rotation or movement of the needle plate 26, should the stud or screw 34; which secures same to the stud 23, become loose and bring the usual needle bar slot 26 from out of proper alignment with the needle 14; and in this manner prevents the needle 14; from striking the peripheral edge 35 on the needle plate 26, which. movement if allowed to happen, would cause the needle to be broken.

It often happens that furs that have not been thoroughly dried are fed through the machine for sewing, in which. case the thread 35 becomes damp and limp and lies in the needle plate slot 26 without forming the usual loop. In order to prevent this and assure the formation of a loop under any and all conditions, I provide an inclined surface 36 upon the resilient member 29. Ihis inclined surface projects above the bottom of the needle slot 26 as shown in Figure 3 and forms an abutment or shoulder 37 for the thread 35 when the needle is being retracted, thus causing the said thread to rise and form a loop 38 for the looper 25 to draw across and complete the stitch.

From the foregoing, it will be seen that I have provided positive means to prevent any upward tippingof the disk into'the path of the needle, and means for positively align ing and maintaining the needle plate in proper position at all times, thereby preventing any breaking of the needle, and that I have also provided means whereby, should any damp or wet furs be fed through the disks of the machine, the thread, although damp, will be urged upwardly to form a proper loop and 'thus prevent any slipstitches while sewing.

Having described my invention, what I claim as new is:

1. In combination with a sewing machine provided with material feeding disks, a

silient member to form a loop of needle thread.

2. In a sewing machine, a bearing, a material feeding disk rotatably mounted on the said bearing, a needle plate associated with the said feeding disk, a reciprocating needle associated with the disk, a resilientmember on the needle plate co-operating with the disk to prevent the said disk from tipping upwardly into the path of the needle, and means on the said resilient member to force the thread into the needle to form a loop iyhlen the needle is being retracted from the c is I.

In a sewing machine provided with a material feeding disk, a needle plate associated with the disk and having a slot therein, a reciprocating threaded needle associ ated with the needle plate and disk, a resilient member on the needle plate cooperating with the disk to prevent same from tipping upwardly into the path of the needle, and an inclined surface on the member to force the thread intothe needle to form a loop when the needle is retracted.

l. In a. sewing machine having a material feeding disk and a needle platethereon, a

7 member on the needle plate cooperating with the disk to prevent the same from tipping upwardly, and means on the member to form a loop of needle thread.

In testimony whereof I hereunto afiix my signature.

HARRY ROSS.

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